Self-clearing blanking dies



l1g 5, 1952 J. souTAR SELF-CLEARING BLNKING DIES 4 Sheets-Sheet 1 FiledMarch 28, 1946 INVENTR v:151m Sauter J ATTORNEY Aug. 5, i952 J. soUTARSELF-CLEARING BLANKING DIES 4 Sheets-Sheet 2 Filed March 28, 1946ATORNEY Aug. 5, 1952 J. soUTAR SELF-CLEARING BLANKING DIES 4Sheets-Shee't 3 Filed March 28, 1946 INVENTOR n BcYfolzn Sauar M4.

A ORNEY Allg 5, l952 J. souTAR 2,605,835

March 28, 1946 4 Sheets-Sheei 4 Patented Aug. 5, 1952 UNITED STATES,PATENr OFFICE j "2,605,835" f Y i A Y SELF-CLEARING BLANKING Dinsl.lohn Soutar, Hux-itiington,Y W.'Va'., Vassig'nor to 'American `(L arand Foundry 'Company,;."Newf York, N. Y., a corporationof New Jersey y oo Applicata@ Marci; 28, 194e, serial Nd: 657,75?

This invention relates in general to'dies and in particular to dies'forcutting or blanking material. Y

It is generallythe practice in blanking dies to use some typeofstrippers to clear the -cut jmaterial from the dies for use elsewhereand to vide blanking dies in which the side edges ofthe cut blank areautomatically released upon raising of the diev holder. y A furtherobject of the invention isthe provision of a blanking die havingfloating or movable shear rblades carried bythe female head.

A still further object of the invention is the provision of aself-clearing blanking die having the parts so arranged as to eliminatethe necessity of resilient or power-actuated strippers. A These andother objects of the invention w' l be apparent to persons skilled inthe art froma study of the following description and accompanyingdrawings, in which;

Fig. 1 is an elevational view of the improved blanking die pair; v

-'Fig. 2 is a plan view of the female die head which in this case isarranged to blanka door sheet for a railwayhopper car; f

Fig. 3j is aaplan view of the male die head;

Fig. 4 is a sectional view taken'substantially on line 4-4 of Fig. 1,but showing the dies in closed position;

Fig. 5 is an enlarged sectional view taken substantially on line 5--5 ofFig. 2;

Fig. 6 is a sectional view similar to Fig. 5 but showing the die pairsclosed, as in Fig. 4, and

Fig. 7 is vacross-sectional view similar to Fig. 4 but showing a slightmodification thereof.

tciainis. (c1. 164-29)v Referring now to the drawings in detail, it will`be seen that the dieV pairk consists of a bottom to the male die membermade upA of a central portionl 2 'surrounded on threev sides at least`by straight hardened cutting elements 4, 6 and 8 and by cornerpiecesIll, IUI, l02 and 103 "also hardened and occupying the spacesbetween thestraight cutting elements.; `These cutting elements are fixed withrespect to the carrier base A.

ySince the die has been' arranged for blanking sheets for railway cardoors punch openings YI2 are attachedto the bottom member,-but itl isunderstood that these may# be used or not,`dependent upon the type ofdoor to be formedk-` kThe top die carrier B isY provided with acentralarea' i8 surrounded byr flanges which-aremachined to provide aVsubstantially horizontal seating surface 20 and a taperedsurface 22arranged at an angle to the flat'surface 20. Substantially straightcutting members 24, 26 and v28- are kmounted on the upper or female headmember B and are adapted to cooperate withl male cutting surfaces 4, 6and 8 respectively. Each of these substantially straight cutting membersis'provided with a flat surface 30 adapted, when vin fully seatedposition, to cooperate with flat surface 20 and they are also providedwith a tapered surface 32 adapted to cooperate with the similarlytapered surface 22 of the carrierr B. In order 'to retain thesubstantially straight cutters `-24,=i26 and 28 vin positionsubstantially horizontallbolts 34 extend through'thecutters andthrough'the flanges of the head member B. These bolts 'engage verticallyelongated slotsf in the cutting members 24 and are rof suicient lengthto permit the movable or floating cutters'to move vertically from theirlowered position ytothe l1.'losi tionin which'flat surfaces 30 andengage. i 'Y n Curved corner pieces 40, 401,402 andili'fare adapted tocooperate with the curved4v corner pieces I0, IUI, |02 Vand |03,respectively ofthe maleu member and each of these curved corner piecesis provided with a fiat upper surface"4 2 adapted to engage a lflatsurface 44 of thefupper die holder B. Each-of the corner pieces isv alsoprovided with, a tapered surface 46V adapted to engage a similarlytapered surface on the ,holder B.` These cornerpieces, due mainly totheir lesser thickness, are carried on the upper'jmember B by means ofvertically extendingbolts l50. Tliese bolts extend through the upperholder with considerable clearance ask clearly shown in Fig; 5 and passwith considerable side clearance through elongated slots `."i2fin thecurved Vmembersjlll), 40H, 402 and 403, thus the curved members 40, 401,402 and 403 are retained against loss and can move laterally withrespect to the flanges ciently wide to permit this operation. It will Yalso be clear to one skilled in the .art that the three tapered surfacesassociated 'with "each corner block 4B, 46| and 402 areprimarily'backing surfaces and such beingthemasathese surfaces may not all beengaged with the-corner blocks during its lateral displacement. .Inaddition to the bolts 50 support members 54 maybe bolted or otherwisesecured to the upper carrier'. B. Each of the cutting members 24, 26,28, 40, 40|, VA02 and Mist-,is-,sloped ias .at-,60. and clearly.indicatedby Fig. 11, thereby reducing the power rel.flquirementsnecessaryto-icut thesheet material. fWhen in operation with --thedie,carrierssepa .lrateda-sheet of material` S .may be slid-in on -top.of athe male die head yand :supported thereby as shown .in Fig. r1.Relative -movement of .the vholders A and B -tow-ardfeach yother .will.cause fthe-cutting members-2-4, 26,.28,-4ll,-40|.-44ll2 and vM13 to[Contact the lplate S. -This ,contact .will -cause the cutters to -moveVinwardly dueto the tapers .-32 and 46 until .-the.nat surfaces-.of .thevrcutters engage- .thefcorresponding flat surfaces of the holder ,-B.-Theirffurthen movement will thus .befstoppedfand the. cutting Tactionwill commence -and progress :until-.the :plate .has `beencompletel-y.sheared v.and the lparts v:are in :the position zas -shown in FigsA and6. Y AVSeparation; of the. holders Vrie/.andy2Bwill -cause 1Vthelfloating orsliding female ediefmember-s to move-,downwardly andoutwardly, f

gtlaus freeingethe blankzand permitting it .toeither lremain ,oredroponto-the topfsurfacefof thev male :die .fm'emben from whichit maybereadilyand easily removed. ...In some ica-seswhere defornfiationvr ofIthe'blank 'fiszfharmfful 'the .fla-t surfaces 2U-.and 44 .may rbe.fmadefgcoextensive vwith .the flatsurface l 8 `of `the :holder .1B ias'shown :in .-Fig.' 7 fandin this 'case -the :entire-.die vholder may be-used toestraighten the -fblanklfollowing:thecutting Faction. vLiftingof the .die holder will againmelease the .blank without fairypossibility of -;distortion, fall as yclearly .described in1:@nnectiorrwith.--liiigsl tonG and .since .the parts :are,substantially identical the vksame l.referer-Ice numerals have @been.-applied. It will be--obvious from :thepreceding descripftioni thatAduring movement .of the ,A die .holders-.toward-.each other V.thefemalecutting members will l-slijde .inwardly to their-nalseatedposition,..after -Nvhich the vcutting will .take place.ASeparation-of `ithe dieholders afterlcutting-Will .permit vthe slid-.ingorlfioating female .diemembers .to move outrwardlyv awayfromthecutlblank permitting-it .to Y,drop bygravity .onto the .uppersurface of the .male .-member. Wherever .straightening desir-ed .the-die,parts vcan `berearranged slightly as Afshovim.inllg 7. Whiletheinvention`has-been -described more .or;less'in.de.tail withparticular 'reference .to the .accompanying drawings, it willbeob-viousto .personslsklled in the art vthatrnodi- 'ca'tions.andrearrangements 4of parts maybe made without Vdeparting fromthe scopeof the in- `yentionas dened by the ,appendedclaims What is claimed is:

1. A pair of relatively movable shearing die members comprising a maledie member and a female die member, movable shear blades carried by saidfemale die member and movable therewith and also relative thereto,inclined surfaces formed on said movable shear blades and femalefdieimember '-andat an kacute'angle tothe direction of movement of thedie members,-said movable shear blades moving into shearing positionsubstantially at right angles to the direction of .shear during-movementof the die members toward each other.

.-A pair .sof relatively movable shearing die lmen'lbers comprising amale die member and a v"female die member, movable shear blades carriedby said female -,die member and movable therewith and also relativethereto, inclined surfaces formed on said movable shear blades andfemale die member and at an vacute angle to the direcftion ofmovementofthedie memberssaid mov- .able shear lblades moving into shearing"position substantially at right angles to the direction :of ,shearduring movement of the die members toward-eachother and receding .from.shearing position during 'separation of the ndie members:wherebythefsheared article will .be released.

, 3. A pair-of rrelatively-rvnovable .die members .comprising -a ,ma-le`body member and -a lfemale .body member,one Yof the body-membersforming la -support for -a plurality of fixed yrelatively straighthardened vcutting elements, said ,surpporting 4body member being.-for-medv withirecesses intermediate the adjacentends of vthe fixedcutting elements, said4 recesses being ,denedinfpart lby outer inclined.surfaces ,extending at yan lacute angle l-to -the'direction'of movementof ithe .supporting -die-member-and by a fbase porti-on, corner diemembers for -seating in said .recesses :having hardened cutting areas,said corner die Ymembers .being-,formed with a lateral side rface havingVacute .angle-portions,corresponding Vtothe acute faces of thefrecessesand adapted to-,be Anormally asso- .ciated therewith, pins projectingfrom the base ,portion-.of saidL recesses, Vslots'formed in the corner.pieces zfor receiving said pins, said slots vvbeing of a,width-,greater than the diameter lof vsaid tpins.toA-permitffreedom ofmovement of said corner pieces toward vtheir -seating position and.lateral movement in .accordance with the ,pitch of the associatedcoactingfangularfaces, whereby said cornerpiecesmay move inwardlaterally-during movement to cutting position andlaterally :outward.during .movement away yfrom cutting v`position.

4. The structure-of :claim 3'characterized in -thatfdepressionsa formedin the vouter faces of .thecorner pieces about lthe slots for seatinghead portions .formed in the outer `ends of the pins.

JOHN y:SO-UTAH.

"REFERENCES CITED `'Ihefollowing references `are of recordin the file ofthis patent:

UNITED STATES 'PATENTS Bouget Apr. 6, "1943

